[TriLUG] Open source spam control & filtering?

[David McDowell]

I'm stuck with Exchange as well.  I went with a purchased solution
from Symantec that includes the Brightmail plugin to their Mail
Security product for AntiSpam/AntiVirus.  I have to say it works quite
well.  The amount of spam in our inboxes has gone from 100 a day for
some people to less than 2 per week - for each employee.  The CEO was
getting over 300 per day... she now gets about less than 1 every other
week.  The results are mixed in that sense, but I'd say that's about
98% give or take.

Now if you want open source... I'm sure others in the thread will
suggest the popular postfix + spamassassin + clamAV + postgrey (new
greylisting stuff).  There have been various discussions on these mail
gateways over the last couple years on list so you may be able to
google search using "site:trilug.org" and find some of that
information.  The greylisting stuff is new.  People are apparently
raving about it... spamassassin simply isn't cutting it by itself
anymore it seems.  I know at home I'm getting 30 spams a day right now
that get through.  It totally sucks.  I have instructions for
implementing greylisting and will probably do so this weekend.

good luck on your choice!  BTW, another reason I went for a paid
solution... someone else is responsible/accountable if the product
fails to deliver!!  :)  Yes I chose the product, but when you pay for
something (in the CEO's eyes) you have greater accountability for it
to work properly.  The SPAM issue was too huge here (b/c of their
previous admins never teaching them anything so they used their email
addresses EVERYWHERE on the Internet) ... so I had to make sure that
solution worked (and I didn't have extra hardware for the SMTP Gateway
either).

David McD


On 12/21/05, Chad Thomsen <chad.thomsen at gmail.com> wrote:
> Am going to put an Exchange server in for email and I have no choice on
> that.  I do however have a choice in Spam/Virus/HTTP filtering for a gateway
> solution.  Want to filter spam, viruses, spyware and possibley stop users
> from visiting black listed web sites that are against company policy.
>
> I am looking at all types of products form Symantec, Barracuda, Iron Port,
> Trend etc etc.  I thought I might even build myself an opensource one.
> Question for you all is there a good open source solution?
>
> I am open to any suggestions.  This is for a corporate environment with
> about 250 users.
>
> Thanks!
>
> Chad
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